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P0A8B Powertrain

14 Volt Power Module System Voltage

The 14V DC/DC converter module reports a "system voltage" condition. 12V vehicle electrical supply may be impaired.

Affected components

  • Pm14v module
  • Dcdc converter

Common causes

  • High likelihood: Internal module fault
  • Medium likelihood: Wiring fault

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • Reduced-power or limp mode may occur

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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